Remove obsolete/duplicate code

lib/draper/base.rb

@@ -155,6 +155,7 @@ module Draper
     def kind_of?(klass)
       super || model.kind_of?(klass)
     end
+    alias :is_a? :kind_of?
 
     def respond_to?(method, include_private = false)
       super || (allow?(method) && model.respond_to?(method))
@@ -175,11 +176,6 @@ module Draper
       end
     end
 
-    def kind_of?(klass)
-      model.kind_of?(klass) || super(klass)
-    end
-    alias :is_a? :kind_of?
-
     def self.method_missing(method, *args, &block)
       model_class.send(method, *args, &block)
     end

spec/draper/base_spec.rb

@@ -422,12 +422,6 @@ describe Draper::Base do
       decorator.sample_truncate.should == "Once..."
     end
   end
-
-  describe "decorator in cancan rules" do
-    it "should answer yes to kind_of? source class" do
-      subject.kind_of?(source.class).should == true
-    end
-  end
   
   describe "#method_missing" do
     context "when #hello_world is called for the first time" do
@@ -448,20 +442,20 @@ describe Draper::Base do
 
   describe "#kind_of?" do
     context "pretends to be of kind of model class" do      
-      it "#kind_of? Decorator" do
-        subject.should be_kind_of Decorator
+      it "#kind_of? decorator class" do
+        subject.should be_kind_of subject.class
       end
 
-      it "#is_a? Decorator" do
-        subject.is_a?(Decorator).should be_true
+      it "#is_a? decorator class" do
+        subject.is_a?(subject.class).should be_true
       end
 
-      it "#kind_of? Product" do
-        subject.should be_kind_of Product
+      it "#kind_of? source class" do
+        subject.should be_kind_of source.class
       end
 
-      it "#is_a? Product" do
-        subject.is_a?(Product).should be_true
+      it "#is_a? source class" do
+        subject.is_a?(source.class).should be_true
       end
     end
   end